how-to block ads
7. DSL 301
A more standard method is by using ipconfig in windows, or ifconfig in *nix.
With Windows, open a command prompt window (Start -> Run -> type cmd) and type ipconfig. You will see your present IP in the results.
The program winipcfg that was familiar in the Windows 9X series doesn't exist in Win2K/WinXP.
You can download a handy little application called wntipcfg to replace it. More info here.
Direct link to download: http://download.microsoft.com/download/win2000platform/wntipcfg/1.00.0.1/nt5/en-us/WntIpcfg_setup.exe
To simplify things, when you finish installing, you can go to the folder where it installed and rename the file from wntipcfg to winipcfg and put that file in the c:\windows folder. Then to use it, use -> Start -> Run - type in winipcfg and the old winipcfg will pop up and will work! Easy for those used to winipcfg.
Thanks to djdanska for updated info on this entry.
Latency typically matters for gamers, for programmers using telnet sessions, and possibly for applications like voice over IP (internet phone) applications. It is possible that an east coast user that has ordered DSL from a west coast ISP may find ping times to an internet site in their own city could be up to 100ms more than a neighbor who picked a local ISP or one with local facilities. 1/10th of a second is not much, but is certainly a drawback for advanced interactive gaming.
It makes sure that all ATM packets that come from the DSLAM to you and from you to the DSLAM are not corrupted, and if any are, it forces a re-send.
Having Interleaving off may introduce packet loss depending upon how clean your line is. If it is a rather clean line, packet loss may be as low as 3%, but if it is a dirty line, packet loss may be as high as 50%.
Having Interleaving off does have its advantages though. It lowers your ping times for instance, and also makes playing in multiplayer games more enjoyable since multiplayer games don't require that all packets reach the destination.
DSLAM for your service, so the only people who can change the interleaving settings are the physical provider of your service.
The exception to this is the Cisco range of ADSL routers, where interleaving can be increased or reduced, if you have the enable password for the router.
Increasing latency by setting higher interleaving rates means your connection is less vulnerable to noise. Decreasing latency by decreasing interleaving may cause connection drops.
Recently, Covad is allowing ISPs to request Interleaving be disabled for their ADSL circuits, reducing ping time considerably. If you are not sure whether Interleaving is off for your ADSL line, contact your ISP and ask.
Redback is not only the name of the server, it is also the name of the company that makes the server. Their website is here.
In other words, Redback is only the name of the router. These are DSL Routers. There are several companies that make DSL Routers, Redback is only one. Others include Juniper, Cisco, and more.
The major significance of Redback is that it receives the ATM Cells right from the ATM Cloud and is able to strip away the ATM Cell and retain the RVPI/RVCI information so it can route the packets back to the specific customer that requested them. Redback is essentially a gateway into the Mindspring Network.
During authentication, Redback checks with Radius to make sure that a customer has access to our network, and to assign that customer a Mindspring IP address. Redback associates that IP address with the customer's RVPI/RVCI information and this is how it is able to retrace the information about where on the other side of the ATM Cloud it should send the response to a request.
After authentication, Redback knows that a customer has access to use us as a gateway into the internet cloud, so it passes internet requests on to a Cisco router and then out into the Internet Cloud. From that point on, Redback acts as a liason between the ATM Cloud and the Internet Cloud, making sure that packets get routed to the right customer, or that internet requests get sent on to their respective location in the WWW.
It allows someone with a dynamic IP to have the ability to auto update your DNS account with a client that you can customize with your own update settings.
When you have everything installed and running properly, the service will auto update the DNS server every time your IP changes. What makes this good is that the TTL (time to live) is set to 60 seconds, so that after your IP changes, within 60 seconds your DNS name would be updated. What the client does is send the new IP to the DNS server and monitors for new IP changes.
Bridged networks are simple to setup when small, but with more and more subscribers, they can start to waste bandwidth with "noise": packets of data that are not meant for you.
Noise on a bridged network should not be confused with the traffic on a shared ethernet, on a bridge, only certain categories of data (broadcasts and ARPs) are passed to network nodes by the bridges, nevertheless, as the size of the bridged network increases, broadcast traffic can rise to be a significant fraction of the link bandwidth. Network configuration problems can also give rise to "storms" where links are flooded with packets making communication difficult.
Routed DSL places a router at your end, and the router "knows" about your network, and also knows about the router at the other end (at the ISP), meaning that it passes traffic that is yours, and destined for the internet, over your link.
Routed DSL, if available, is a more expensive option than bridged DSL, and is normally only provided in a business DSL package. Business DSL packages have higher quality of service guarantees, and these can be better met with routed DSL. Routed DSL is also slightly more secure, as it is harder for intruders who are on a nearby address to impersonate machines or snoop traffic.
Feedback received on this FAQ entry:
In the US, lines for T1 data are normally treated as higher importance by telcos, than DSL lines, so time to repair and provisioning can be considerably faster. A T1 fault may be repaired within hours, or a day, whereas a DSL line fault could be a 5 day turn around time.
The other important difference is that T1 lines are more easily repeated to cover longer distances, something that has not yet happened for SDSL lines.
T1 lines are significantly more expensive than DSL lines, a monthly T1 lease, with internet bandwidth, can amount to $1000 or more, compare that with SDSL prices of a few hundred dollars for the same speed.
T1 lines are often provisioned with a service level agreement (SLA) that may include guarantees on the speed, and reliability of the service, maximum time to repair, compensation in the event of an outage, and so on. A 1.5mbit SDSL line will generally come with an SLA that is less favorable to the customer.
Feedback received on this FAQ entry:
USB minus: USB software drivers may not be as stable as an ethernet/external modem setup. All USB devices need significant CPU power to control, especially when in use. No possibility of insertion of "USB firewall" in between the USB modem and the computer. Harder to try out other operating systems. Newer releases of windows may require a driver upgrade that is not available for a period of time.
1st) Verify that the TCP/IP protocol is installed and your IP is set to 10.0.0.x and subnet mask is set to 255.255.255.0 or 255.0.0.0 (both work)
Q:How do I Verify my TCP/IP Settings?
A:right click on Network Neighborhood (assuming your using Windows 98), then properties. The Network window opens. Scroll down to find TCP/IP - 'your network card' (be aware there may be more that one if you have a dial-up connection. that would look like TCP/IP - Dial-Up Adapter). Click on that listing. click on Properties. The TCP/IP Properties window opens. Select the IP Address tab. Here you can see your IP Address & Subnet Mask.
Q:How do I install TCP/IP, because its not listed for my network card (NIC)?
A:In the Network window that you have open, select the Add... button, select Protocol, then Add... Now, in this exact sequence, select Microsoft from the right side and TCP/IP from the left (you may need to scroll down). Now click on OK. At this point it wil ask you for the Windows 98 CD and eventually want to restart you computer.
Q:OK, TCP/IP is installed, how do I put in the right settings?
A:refer to 'Q:How do I Verify my TCP/IP Settings?' to get to the right place. Once you click on the IP Address teb, select SPecify an IP address:, then in IP Address: type 10.0.0.2 and in Subnet Mask: type 255.0.0.0 (note: a couple of different settings work here, as I mentioned above)
2nd) Telnet to your SpeedStream 5260 on 10.0.0.1.
Q: How do I Telnet? [Moment of truth!]
A: (again in Windows 98) click on Start, then Run... Type 'Telnet 10.0.0.1' without the quotes. A Telnet window will open. It also may try to connect to your ISP (I'm using RASPPPoE and the Dialup Connection widow opens... Just hit the Cancel button). You should see 'Command-)' in the Telnet window. FYI, the connect process only should take a couple of seconds. If it takes longer, it probably won't connect. If that is the case, verify that you don't have any other devices on your network using 10.0.0.1 as the IP address. Also, verify you TCP/IP setup is correct. I have seen mention that the install tech's may disable a telnet session in. I don't ~believe~ that is possable, but I do know that the IP address or subnet mask can be changed. If that is the case, good luck, because I have no answer to that.
3rd) Run commands in the telnet session.
A:its pretty basic. Use the '?' to get help, either general or specific. For instance, at the 'Command-)' prompt, type '?' (with out the quotes, of course) and hit Enter. you should see:
show Shows system information, status, IP configuration
set Sets configuration parameters
delete Deletes NAPT server entries, routes, or PVCs
default Sets various parameters to factory defaults
clear Clears statistics
reboot Reboots the router
firmware Downloads new firmware to the router
getconfig Set router configuration from a file
putconfig Save router configuration to a file
quit (exit, logout, logoff) exits command session
logout (exit, logout, logoff) exits command session
logoff (exit, logout, logoff) exits command session
exit (exit, logout, logoff) exits command session
atmping Tests the ATM link by transmitting an OAM loopback cell
ping Sends datagram round-trip to specified IP host
traceroute Traces the route (hops) from the router to an IP
This is a list of all the top level commands. You are able to type some of the commands without any options. For instance, type 'show' to see the General Bridge Information. Or type 'show ?' to see its options
Some commands do need the options, though. Now type 'set ?' and you'll see:
bridge Enables or disables the bridge function
bridgefilter Enables or disables bridge filtering
bridgemac Enters MAC address into the bridge filter table
dsl Sets DSL interface state to reset, connected, or disconnect
ethcfg Sets the Ethernet communication mode
ethip Sets Ethernet IP address, and network mask
hostname Sets the system hostname
ipgateway Sets the IP gateway (default route)
password Sets a new password for the router
spantree Enables or disables spanning tree
vc Configures virtual circuits
This is a list of all the second level options. To see what a specifc command does type 'set ethip ?' and you'll see:
usage: set ethcfg (full | half)
Allows configuration of the data transmission direction of
the Ethernet interface. The interface can be set to 'half'
(one-way transmission at a time) or 'full' duplex (transmission in both directions at once). The default setting is 'half'.
I believe you can use this notation to get help on every command avaliable in the router, although I haven't tested every command
BTW, the 'set ethcfg full' command shown above is the only thing that I have changed on my SpeedStream 5260. This ~should~ help if you have a full duplex NIC. DO NOT use if you NIC is half duplex or you are unsure.
Warning: Changing some of these settings my make it impossiable to connect to the internet. I cannot take any responsibility for any changes you might make. Be sure to save or write down every change so you can change it later if it doesn't work. USE AT YOUR OWN RISK.
Lastly and optionally, remove the TCP/IP... binding from you NIC in the Network window (find you NIC, click properties, then click Bindings, then uncheck TCP/IP) as I have found that if TCP/IP os bound to my NIC, whilw I am on the internet, there will be a 30Sec. pause every 5min. or so. This will remove the TCP/IP protocol from you computer (unless its bound to another NIC) and wil prompt you to restart. At this point you will not be able to
telnet to the SpeedStream 5260, unless you add TCP/IP back.
Now that you know how to get in, post any SpeedStream 5260 speed or security tweeks that you come up with, as the only one I've know of is setting it to Full dulplex.
Feedback received on this FAQ entry:
AnalogX Proxy to share the connection.
If you have an external Ethernet modem, you can put two NIC (Network Interface Cards) so that there is one NIC for your ADSL line and one NIC for your LAN, and install a proxy program such as AnalogX Proxy.
Or you can buy a router such as a NetGear 311 or LinkSys (this option will only work if you have an external Ethernet modem).
Also read About DSL for lots more information